170. O mankind! Verily, there has come to you the Messenger (Muhammad ) with the truth from your Lord, so believe in him, it is better for you. But if you disbelieve, then certainly to Allah belongs all that is in the heavens and the earth. And Allah is Ever All-Knowing, All-Wise.

“O mankind! Verily, there has come to you the Messenger with the truth from your Lord, so believe in him, it is better for you.”

This Ayah means, Muhammad has come to you with guidance, the religion of truth and clear proof from Allah. Therefore believe in what he has brought you and follow him, for this is better for you. Allah then said,

﴿وَإِن تَكْفُرُواْ فَإِنَّ للَّهِ مَا فِى السَّمَـوَتِ وَالاٌّرْضِ﴾

“But if you disbelieve, then certainly to Allah belongs all that is in the heavens and the earth”

Allah is far too rich than to need you or your faith, and no harm could ever affect Him because of your disbelief. Allah said in another Ayah,